Points have only the property of location.
Points are typically used to model singular, discrete features such as buildings, wells, power poles, sample locations.
Points are zero-dimensional objects that contain only a single coordinate pair. Determines the spatial reference for processing. The extent will be calculated as the intersection of the extents of the input rasters. Three fundamental vector types exist in geographic information systems (GIS): points, lines, and polygons. The features, or portion of features, that are common to all inputs (that is, they intersect) will be written to the output feature class. In my case I combined altitudes above 1500m and steep slopes and now I've got all the lowland-flatland parts of all administrative areas (very close to the real settlement area). The Intersect tool calculates the geometric intersection of any number of feature classes and feature layers. You do not describe what your data is or the range of values so assuming your first raster has values 1,2 & 3 then make you second have 10,100 & 1000 then add them together and the combination of values will give you what intersects what. 1 While calculating the slope out of the elevation-data (SRTM) play with different 'Z'-values Ģ Reproject the raster-layer to the same type as the vector-layer ģ Extract the points above/below the wished threshold with the Raster calculator Ĥ Convert the threshold-raster-layer into a vector-layer ĥ Open the Attribute table of the new layer and search for either 0 or 1 and delete them all at onceĦ Intersect the two vector-layers in the desired manner (intersect or difference) - Ĭomment: This way (with the Raster calculator) it is very easy to combine several raster-layers and get a combined 'clipping-mask' for the vector-layer - with just ONE computational intense step of Polygonization and Intersection. Extracting raster values to a polygon means finding raster cells that intersect with the polygons and get the value of all those cells and assigns them to the. A cell in a raster can only have 1 value so the concept of intersect in vector does not apply to raster data.
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